Question

Fill in the blanks.


1) The sum of complimentary angle is ............ .


2) In triangle ABC, angle ACD is exterior angle, if m angle A = 40 degree , m angle B = 60° then m. angle ACD = ............. .



3) 10 % of 50 means .............. .



4) 3/4 means ............ %


pls give me answer​

Answer 1

Answer:

1. 180°
2. 80°
3. 5
4. 3/4%

mark as brainliast

Answer 2

Answer:

★ Question 1

1) The sum of complementary angle is __

Answer: 90°

★ Question 2

2) In triangle ABC, angle ACD is exterior angle, if angle A = 40° , angle B = 60° then find angle ACD = ___

Solution:

$\setlength{\unitlength}{1cm}\begin{picture}(0,0)\linethickness{0.4mm}\qbezier(1, 0)(1,0)(3,3)\qbezier(5,0)(5,0)(3,3)\qbezier(8,0)(8.2,0)(1,0)\qbezier(3.5,2.3)(3,2)(2.5,2.3)\qbezier(1.5,0.8)(1.8,0.5)(1.8, 0)\qbezier(4.7,0.5)(5.5,0.7)(5.8,0)\put(5.2, 0){\vector(1, 0){3}}\put(1.8, 0.5){ \sf 60^{\circ} }\put(2.8, 1.8){ \sf 40^{\circ} }\put(2.9, 3.1){\sf A}\put(0.7, - 0.3){\sf B}\put(4.8, - 0.3){\sf C}\put(8, -0.3){\sf D}\end{picture}$

If ∆ABC, ∠A = 40° , ∠B = 60°

so,

∠A + ∠B = ∠ACD .........( property of exterior angle )

⟹ ∠ACD = 40° + 60°

⟹ ∠ACD = 100°

Hence, ∠ACD = 100°

★ Question 3

3) 10% of 5 means = __

Solution:

$= \dfrac{10}{100} \times 50$

$\bf{= 5}$

★ Question 4

4) 3/4 means __ %

Solution:

$= \dfrac{3}{4} \times 100$

$\bf{ = 75\%}$

★ More Info ★

• Sum of all angles in a straight line is always 180°

• The sum of the measure of two angles is 180°, then the angles are said to be supplementary angles.

• The sum of the measure of two angles is 90°, then the angles are said to be complementary angles.